ZHCSUJ4B January 2022 – January 2024 TPS61376
PRODUCTION DATA
- 1
- 1 特性
- 2 應(yīng)用
- 3 說明
- 4 Pin Configuration and Functions
- 5 Specifications
-
6 Detailed Description
- 6.1 Overview
- 6.2 Functional Block Diagram
- 6.3
Feature Description
- 6.3.1 VCC Power Supply
- 6.3.2 Enable and Programmable UVLO
- 6.3.3 Soft Start and Inrush Current Control During Start-Up
- 6.3.4 Switching Frequency
- 6.3.5 Adjustable input average Current Limit
- 6.3.6 Shut Down and Load Disconnect
- 6.3.7 Overvoltage Protection
- 6.3.8 Output Short Protection
- 6.3.9 Thermal Shutdown
- 6.4 Device Functional Modes
- 7 Application and Implementation
- 8 Device and Documentation Support
- 9 Revision History
- 10Mechanical, Packaging, and Orderable Information
封裝選項(xiàng)
機(jī)械數(shù)據(jù) (封裝 | 引腳)
- RYH|13
散熱焊盤機(jī)械數(shù)據(jù) (封裝 | 引腳)
訂購(gòu)信息
6.3.2 Enable and Programmable UVLO
The TPS61376 has a dual function enable and UVLO circuit. When the input voltage at the VIN pin is above the input UVLO rising threshold of 2.8V and the EN/UVLO pin is pulled above rising threshold, the TPS61376 is enabled and starts switching. The EN/UVLO pin has an accurate UVLO voltage threshold to support programmable input under-voltage lockout with hysteresis. A hysteresis current IUVLO_HYS is sourced out of the EN/UVLO pin to provide hysteresis that prevents on/off chattering in the presence of input voltage noise. By using resistor divider as shown in Figure 6-1 , the turn on threshold can be calculated by using Equation 1.
where
- VUVLO is the UVLO threshold of 0.813V at the EN/UVLO pin
The hysteresis between the UVLO turn on threshold and turn off threshold is set by the upper resistor in the EN/UVLO resistor divider and is given by Equation 2
where
- IUVLO is the sourcing current from the EN/UVLO pin when the voltage at the EN/UVLO pin is above VUVLO
Figure 6-1 Programmable UVLO with Resistor Divider at EN/UVLO Pin